I hate throwing perfectly good bottles in the recycling, so I designed this little handle to turn a used wide-mouth PET bottle into a water bottle. Perfect for hiking, sports or general day-to-day use.

You can even turn it into a sipper bottle with some food-grade silicone tubing. Drill two holes slightly smaller than the tubing in the lid, and push the tubing through. To drink, pull the short end of the tubing out of it's hole, which becomes an air vent. Cut the tubing at an angle, so it's easy to re-insert in the hole when you've finished drinking.

I printed it on Prusa Mini using PLA. I used 4 perimeter layers and 20% infill, which seems strong enough.